I have had the note below come in.
If you receive a phone call on your mobile from any person, saying
that he or she is a company engineer, or telling that they're checking your mobile line, and you have to press #90 or #09 or any other number, end this call immediately without pressing any numbers.
There is a fraud company using a device that once you press #90 or
#09 they can access your "SIM" card and make calls at your expense.
Forward this message to as many colleagues, relatives and friends as you can, to stop it.

